Smith International, Inc.

Jaye M Shelton

James May

Glenn L Allison

Gary Pfannenstiel

Garland Vance Ford

A riser assembly includes a rotating control housing connected between an upper portion and a lower portion of a riser assembly, and a packing element rotatable with respect to the rotating control housing, wherein the packing element is configured to isolate an annulus of the lower portion from the upper portion when a drillstring is engaged through the packing element, and wherein the packing element is configured to be retrieved and replaced through the upper portion.

Rotating control device apparatus and method

The rotary drilling head assembly of the present invention includes a housing having a bore for receiving a drive member. The drive member has an outer diameter of less than 17 &frac12; inches to pass through a 17&frac12; inch opening in a rotary table. A bearing assembly is disposed between the housing and drive member allowing the drive member to rotate within the housing and includes an outer stationary portion and an inner rotating portion. Retaining clamps attach the outer stationary portion to the housing and the rotating portion to the drive member. Rotary seal assemblies isolate the bearing assembly and its lubrication system from the drilling fluid and prevent premature wear and failure of the bearing. The bearing assembly includes a plurality of opposing disc-like members that have flat bearing surfaces meeting on a substantially planar surface of contact. The disc-like members are preferably made of a polycrystalline diamond material.

Growing community of inventors

Spring, TX, United States of America

Jaye M Shelton